492644689 has 4 divisors (see below), whose sum is σ = 493114480. Its totient is φ = 492174900.

The previous prime is 492644681. The next prime is 492644693. The reversal of 492644689 is 986446294.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 492644689 - 2³ = 492644681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (492644681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233319 + ... + 235420.

It is an arithmetic number, because the mean of its divisors is an integer number (123278620).

Almost surely, 2^492644689 is an apocalyptic number.

It is an amenable number.

492644689 is a deficient number, since it is larger than the sum of its proper divisors (469791).

492644689 is a wasteful number, since it uses less digits than its factorization.

492644689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469790.

The product of its digits is 2985984, while the sum is 52.

The square root of 492644689 is about 22195.6006676999. The cubic root of 492644689 is about 789.7893413639.

The spelling of 492644689 in words is "four hundred ninety-two million, six hundred forty-four thousand, six hundred eighty-nine".